In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The arrangements for the observation of the May 28, 1900 eclipse were made by Professor of Mathematics Stimson J. Brown, U.S.N., then Astronomical Director acting under the authority of Superintendent Capt. C. H. Davis, U.S.N. Two stations were equipped on the central line, Pinehurst, NC, and Barnesville, GA, to duplicate work in case of cloudy weather. Professor A. N. Skinner had charge of the Pinehurst, NC station. The 40-foot camera was handled by Mr. A. L. Colton, assisted by Mr. Melville...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The arrangements for the observation of the May 28, 1900 eclipse were made by Professor of Mathematics Stimson J. Brown, U.S.N., then Astronomical Director acting under the authority of Superintendent Capt. C. H. Davis, U.S.N. Two stations were equipped on the central line, Pinehurst, NC, and Barnesville, GA, to duplicate work in case of cloudy weather. Professor A. N. Skinner had charge of the Pinehurst, NC station. The 40-foot camera was handled by Mr. A. L. Colton, assisted by Mr. Melville...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The arrangements for the observation of the May 28, 1900 eclipse were made by Professor of Mathematics Stimson J. Brown, U.S.N., then Astronomical Director acting under the authority of Superintendent Capt. C. H. Davis, U.S.N. Two stations were equipped on the central line, Pinehurst, NC, and Barnesville, GA, to duplicate work in case of cloudy weather. Professor A. N. Skinner had charge of the Pinehurst, NC station. The 40-foot camera was handled by Mr. A. L. Colton, assisted by Mr. Melville...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The Lowell Observatory Eclipse Expedition to observe the solar eclipse of June 8, 1918 selected Syracuse, Kansas as their observation station location. It was planned to take direct photographs of the corona and the region about the Sun with the following instruments: Two objectives of 5 inches aperture and 38.7 (39) feet focus, tower telescope mounting, with exposures varying from .5s to 45s. This plate was given to the U.S. Naval Observatory by Dr. V. M. Slipher. The large scale photographs...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
Likely a plate from the June, 1918 solar eclipse expedition to Baker, Oregon. In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
Likely a plate from the June, 1918 solar eclipse expedition to Baker, Oregon. In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
Likely a plate from the June, 1918 solar eclipse expedition to Baker, Oregon. In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
Likely a plate from the June, 1918 solar eclipse expedition to Baker, Oregon. In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
Likely a copy of a plate from the June, 1918 solar eclipse expedition to Baker, Oregon. In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens,...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
Likely a copy of a plate from the June, 1918 solar eclipse expedition to Baker, Oregon. In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens,...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The Lowell Observatory Eclipse Expedition to observe the solar eclipse of June 8, 1918 selected Syracuse, Kansas as their observation station location. It was planned to take direct photographs of the corona and the region about the Sun with the following instruments: Two objectives of 5 inches aperture and 38.7 (39) feet focus, tower telescope mounting, with exposures varying from .5s to 45s. This plate was given to the U.S. Naval Observatory by Dr. V. M. Slipher. The large scale photographs...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
This plate was likely taken during the May 28, 1900 total solar eclipse expedition to Barnesville, Georgia by the United States Naval Observatory. The arrangements for the observation of the May 28, 1900 eclipse were made by Professor of Mathematics Stimson J. Brown, U.S.N., then Astronomical Director at the United States Naval Observatory, acting under the authority of Superintendent Capt. C. H. Davis, U.S.N. Two stations were equipped on the central line, Pinehurst, NC, and Barnesville, GA,...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
This plate was likely taken during the May 28, 1900 total solar eclipse expedition to Barnesville, Georgia by the United States Naval Observatory. The arrangements for the observation of the May 28, 1900 eclipse were made by Professor of Mathematics Stimson J. Brown, U.S.N., then Astronomical Director at the United States Naval Observatory, acting under the authority of Superintendent Capt. C. H. Davis, U.S.N. Two stations were equipped on the central line, Pinehurst, NC, and Barnesville, GA,...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
This plate was likely taken during the May 28, 1900 total solar eclipse expedition to Barnesville, Georgia by the United States Naval Observatory. The arrangements for the observation of the May 28, 1900 eclipse were made by Professor of Mathematics Stimson J. Brown, U.S.N., then Astronomical Director at the United States Naval Observatory, acting under the authority of Superintendent Capt. C. H. Davis, U.S.N. Two stations were equipped on the central line, Pinehurst, NC, and Barnesville, GA,...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The expedition to observe the total solar eclipse of August 7, 1869, was organized under the authority of the superintendent of the Nautical Almanac Office, Professor J. H. C. Coffin. Five thousand dollars was appropriated by Congress to support the expedition, and Burlington, Iowa was selected as the primary station. Professor Henry Morton, secretary of the Franklin Institute in Philadelphia, was selected to oversee the photographic aspect of the expedition. Three parties of photographers were...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The expedition to observe the total solar eclipse of August 7, 1869, was organized under the authority of the superintendent of the Nautical Almanac Office, Professor J. H. C. Coffin. Five thousand dollars was appropriated by Congress to support the expedition, and Burlington, Iowa was selected as the primary station. Professor Henry Morton, secretary of the Franklin Institute in Philadelphia, was selected to oversee the photographic aspect of the expedition. Three parties of photographers were...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The expedition to observe the total solar eclipse of August 7, 1869, was organized under the authority of the superintendent of the Nautical Almanac Office, Professor J. H. C. Coffin. Five thousand dollars was appropriated by Congress to support the expedition, and Burlington, Iowa was selected as the primary station. Professor Henry Morton, secretary of the Franklin Institute in Philadelphia, was selected to oversee the photographic aspect of the expedition. Three parties of photographers were...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The expedition to observe the total solar eclipse of August 7, 1869, was organized under the authority of the superintendent of the Nautical Almanac Office, Professor J. H. C. Coffin. Five thousand dollars was appropriated by Congress to support the expedition, and Burlington, Iowa was selected as the primary station. Professor Henry Morton, secretary of the Franklin Institute in Philadelphia, was selected to oversee the photographic aspect of the expedition. Three parties of photographers were...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The expedition to observe the total solar eclipse of August 7, 1869, was organized under the authority of the superintendent of the Nautical Almanac Office, Professor J. H. C. Coffin. Five thousand dollars was appropriated by Congress to support the expedition, and Burlington, Iowa was selected as the primary station. Professor Henry Morton, secretary of the Franklin Institute in Philadelphia, was selected to oversee the photographic aspect of the expedition. Three parties of photographers were...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Porta Coeli, Photographer George H. Peters obtained seven photographs with the 65-foot camera of 2s, 3s, 35s, 5s, 15s, 3s, and 2s exposure, and Assistant Astronomer George A. Hill obtained four with the 104-inch camera of 5s, 10s, 40s, and 22s exposure. The principal object was to trace the inner coronal rays to their...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Guelma, Mr. W. W. Dinwiddie obtained eight photographs with the 40-foot camera, the exposure times being 2s, 5s, 13s, 88s, 27s, 4s, 4s, and .25s, and Yeoman F. A. Achen obtained four photographs with the 15 ft camera, of 30s, 55s, 90s, and 10s exposure. This plate was likely taken at Guelma with the 40-foot camera. It was...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three different locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Daroca, Assistant L. G. Hoxton obtained seven photographs with the 40-foot camera. All exposures, on development at Porta Coeli, turned out sharp with the exception of the last, which was blurred (likely as a result of mechanical jarring due to the rapidity of manipulation necessary). A composite drawing was made...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three different locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Daroca, Assistant L. G. Hoxton obtained seven photographs with the 40-foot camera. All exposures, on development at Porta Coeli, turned out sharp with the exception of the last, which was blurred (likely as a result of mechanical jarring due to the rapidity of manipulation necessary). A composite drawing was made...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three different locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Daroca, Assistant L. G. Hoxton obtained seven photographs with the 40-foot camera. All exposures, on development at Porta Coeli, turned out sharp with the exception of the last, which was blurred (likely as a result of mechanical jarring due to the rapidity of manipulation necessary). A composite drawing was made...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three different locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Daroca, Assistant L. G. Hoxton obtained seven photographs with the 40-foot camera. All exposures, on development at Porta Coeli, turned out sharp with the exception of the last, which was blurred (likely as a result of mechanical jarring due to the rapidity of manipulation necessary). A composite drawing was made...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
p.B25 - 40 ft camera, at Daroca. 0.5s The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three different locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Daroca, Assistant L. G. Hoxton obtained seven photographs with the 40-foot camera. All exposures, on development at Porta Coeli, turned out sharp with the exception of the last, which was blurred (likely as a result of mechanical jarring due to the rapidity of manipulation...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three different locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Daroca, Assistant L. G. Hoxton obtained seven photographs with the 40-foot camera. All exposures, on development at Porta Coeli, turned out sharp with the exception of the last, which was blurred (likely as a result of mechanical jarring due to the rapidity of manipulation necessary). A composite drawing was made...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three different locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Daroca, Assistant L. G. Hoxton obtained seven photographs with the 40-foot camera. All exposures, on development at Porta Coeli, turned out sharp with the exception of the last, which was blurred (likely as a result of mechanical jarring due to the rapidity of manipulation necessary). A composite drawing was made...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Porta Coeli, Photographer George H. Peters obtained seven photographs with the 65-foot camera of 2s, 3s, 35s, 5s, 15s, 3s, and 2s exposure, and Assistant Astronomer George A. Hill obtained four with the 104-inch camera of 5s, 10s, 40s, and 22s exposure. The principal object was to trace the inner coronal rays to their...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Porta Coeli, Photographer George H. Peters obtained seven photographs with the 65-foot camera of 2s, 3s, 35s, 5s, 15s, 3s, and 2s exposure, and Assistant Astronomer George A. Hill obtained four with the 104-inch camera of 5s, 10s, 40s, and 22s exposure. The principal object was to trace the inner coronal rays to their...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Porta Coeli, Photographer George H. Peters obtained seven photographs with the 65-foot camera of 2s, 3s, 35s, 5s, 15s, 3s, and 2s exposure, and Assistant Astronomer George A. Hill obtained four with the 104-inch camera of 5s, 10s, 40s, and 22s exposure. The principal object was to trace the inner coronal rays to their...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Guelma, Mr. W. W. Dinwiddie obtained eight photographs with the 40-foot camera, the exposure times being 2s, 5s, 13s, 88s, 27s, 4s, 4s, and .25s, and Yeoman F. A. Achen obtained four photographs with the 15 ft camera, of 30s, 55s, 90s, and 10s exposure. This plate was likely taken at Guelma with the 40-foot camera. It was...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
This plate was likely taken during the May 28, 1900 total solar eclipse expedition to Barnesville, Georgia by the United States Naval Observatory. The arrangements for the observation of the May 28, 1900 eclipse were made by Professor of Mathematics Stimson J. Brown, U.S.N., then Astronomical Director at the United States Naval Observatory, acting under the authority of Superintendent Capt. C. H. Davis, U.S.N. Two stations were equipped on the central line, Pinehurst, NC, and Barnesville, GA,...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Porta Coeli, Photographer George H. Peters obtained seven photographs with the 65-foot camera of 2s, 3s, 35s, 5s, 15s, 3s, and 2s exposure, and Assistant Astronomer George A. Hill obtained four with the 104-inch camera of 5s, 10s, 40s, and 22s exposure. The principal object was to trace the inner coronal rays to their...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Guelma, Mr. W. W. Dinwiddie obtained eight photographs with the 40-foot camera, the exposure times being 2s, 5s, 13s, 88s, 27s, 4s, 4s, and .25s, and Yeoman F. A. Achen obtained four photographs with the 15 ft camera, of 30s, 55s, 90s, and 10s exposure. The original plate was likely taken at Guelma with the 40-foot camera....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three different locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Daroca, Assistant L.G. Hoxton obtained seven photographs with the 40-foot camera, the exposure times being 0.5s, 2s, 5s, 45s, 120s, 5s, and snapshot. Paymaster H. R. Insley obtained three with the 12-foot camera of 5s, 70s, and 10s exposure; and Midshipman E. W. Chafee obtained three with the 36-inch Dallmeyer...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory sent an expedition to observe the total eclipse of the sun on 21 August 1932. The site selected was on a flat-topped hill about 700 feet above sea level, on a farm half way between Limerick and Limington, Maine. The site selected was approximately one-half mile from the center line of totality. Captain C. H. J. Keppler, U.S.N., was in charge of the expedition. Joining him was Senior Astronomer C. B. Watts, Astronomer P. Sollenberger, and Associate Astronomers G. M....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory sent an expedition to observe the total eclipse of the sun on 21 August 1932. The site selected was on a flat-topped hill about 700 feet above sea level, on a farm half way between Limerick and Limington, Maine. The site selected was approximately one-half mile from the center line of totality. Captain C. H. J. Keppler, U.S.N., was in charge of the expedition. Joining him was Senior Astronomer C. B. Watts, Astronomer P. Sollenberger, and Associate Astronomers G. M....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory sent an expedition to observe the total eclipse of the sun on 21 August 1932. The site selected was on a flat-topped hill about 700 feet above sea level, on a farm half way between Limerick and Limington, Maine. The site selected was approximately one-half mile from the center line of totality. Captain C. H. J. Keppler, U.S.N., was in charge of the expedition. Joining him was Senior Astronomer C. B. Watts, Astronomer P. Sollenberger, and Associate Astronomers G. M....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory sent an expedition to observe the total eclipse of the sun on 21 August 1932. The site selected was on a flat-topped hill about 700 feet above sea level, on a farm half way between Limerick and Limington, Maine. The site selected was approximately one-half mile from the center line of totality. Captain C. H. J. Keppler, U.S.N., was in charge of the expedition. Joining him was Senior Astronomer C. B. Watts, Astronomer P. Sollenberger, and Associate Astronomers G. M....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory sent an expedition to observe the total eclipse of the sun on 21 August 1932. The site selected was on a flat-topped hill about 700 feet above sea level, on a farm half way between Limerick and Limington, Maine. The site selected was approximately one-half mile from the center line of totality. Captain C. H. J. Keppler, U.S.N., was in charge of the expedition. Joining him was Senior Astronomer C. B. Watts, Astronomer P. Sollenberger, and Associate Astronomers G. M....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory sent an expedition to observe the total eclipse of the sun on 21 August 1932. The site selected was on a flat-topped hill about 700 feet above sea level, on a farm half way between Limerick and Limington, Maine. The site selected was approximately one-half mile from the center line of totality. Captain C. H. J. Keppler, U.S.N., was in charge of the expedition. Joining him was Senior Astronomer C. B. Watts, Astronomer P. Sollenberger, and Associate Astronomers G. M....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The Naval Observatory eclipse expedition to Iloilo, The Philippines, for the May 9, 1929 eclipse was undertaken chiefly for the purpose of obtaining photographs of the inner and outer corona. The vicinity of Iloilo was selected for the eclipse site because it was centrally located in the zone of totality, was easily accessible, and meteorological statistics showed favorable weather conditions compared to other locations. The plate shown here was taken with the 65-foot camera, operated by Prof....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The Naval Observatory eclipse expedition to Iloilo, The Philippines, for the May 9, 1929 eclipse was undertaken chiefly for the purpose of obtaining photographs of the inner and outer corona. The vicinity of Iloilo was selected for the eclipse site because it was centrally located in the zone of totality, was easily accessible, and meteorological statistics showed favorable weather conditions compared to other locations. The plate shown here was taken with the 65-foot camera, operated by Prof....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The Naval Observatory eclipse expedition to Iloilo, The Philippines, for the May 9, 1929 eclipse was undertaken chiefly for the purpose of obtaining photographs of the inner and outer corona. The vicinity of Iloilo was selected for the eclipse site because it was centrally located in the zone of totality, was easily accessible, and meteorological statistics showed favorable weather conditions compared to other locations. The plate shown here was taken with the 65-foot camera, operated by Prof....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The Naval Observatory eclipse expedition to Iloilo, The Philippines, for the May 9, 1929 eclipse was undertaken chiefly for the purpose of obtaining photographs of the inner and outer corona. The vicinity of Iloilo was selected for the eclipse site because it was centrally located in the zone of totality, was easily accessible, and meteorological statistics showed favorable weather conditions compared to other locations. The plate shown here was taken with the 65-foot camera, operated by Prof....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The Naval Observatory eclipse expedition to Iloilo, The Philippines, for the May 9, 1929 eclipse was undertaken chiefly for the purpose of obtaining photographs of the inner and outer corona. The vicinity of Iloilo was selected for the eclipse site because it was centrally located in the zone of totality, was easily accessible, and meteorological statistics showed favorable weather conditions compared to other locations. The plate shown here was taken with the 65-foot camera, operated by Prof....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The Naval Observatory eclipse expedition to Iloilo, The Philippines, for the May 9, 1929 eclipse was undertaken chiefly for the purpose of obtaining photographs of the inner and outer corona. The vicinity of Iloilo was selected for the eclipse site because it was centrally located in the zone of totality, was easily accessible, and meteorological statistics showed favorable weather conditions compared to other locations. The plate shown here was taken with the 65-foot camera, operated by Prof....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The United States Naval Observatory expedition to observe the total solar eclipse of January 14, 1926 was funded by Congress with an appropriation of $3,670. For a full report of the expedition, see Publications of the United States Naval Observatory, 2nd series, Volume 13, Part 2, Appendix III. The objective used was of triple construction with the elements practically in contact. These rays come approximately to the same focal plane, making the objective achromatic for all requisite wave...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The United States Naval Observatory expedition to observe the total solar eclipse of January 14, 1926 was funded by Congress with an appropriation of $3,670. For a full report of the expedition, see Publications of the United States Naval Observatory, 2nd series, Volume 13, Part 2, Appendix III. The objective used was of triple construction with the elements practically in contact. These rays come approximately to the same focal plane, making the objective achromatic for all requisite wave...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Guelma, Mr. W. W. Dinwiddie obtained eight photographs with the 40-foot camera, the exposure times being 2s, 5s, 13s, 88s, 27s, 4s, 4s, and .25s, and Yeoman F. A. Achen obtained four photographs with the 15 ft camera, of 30s, 55s, 90s, and 10s exposure. The original plate was likely taken at Guelma with the 40-foot camera....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Guelma, Mr. W. W. Dinwiddie obtained eight photographs with the 40-foot camera, the exposure times being 2s, 5s, 13s, 88s, 27s, 4s, 4s, and .25s, and Yeoman F. A. Achen obtained four photographs with the 15 ft camera, of 30s, 55s, 90s, and 10s exposure. This plate was likely taken at Guelma with the 40-foot camera. It was...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Guelma, Mr. W. W. Dinwiddie obtained eight photographs with the 40-foot camera, the exposure times being 2s, 5s, 13s, 88s, 27s, 4s, 4s, and .25s, and Yeoman F. A. Achen obtained four photographs with the 15 ft camera, of 30s, 55s, 90s, and 10s exposure. The original plate was likely taken at Guelma with the 40-foot camera....
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Guelma, Mr. W. W. Dinwiddie obtained eight photographs with the 40-foot camera, the exposure times being 2s, 5s, 13s, 88s, 27s, 4s, 4s, and .25s, and Yeoman F. A. Achen obtained four photographs with the 15 ft camera, of 30s, 55s, 90s, and 10s exposure. This plate was likely taken at Guelma with the 40-foot camera. It was...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Guelma, Mr. W. W. Dinwiddie obtained eight photographs with the 40-foot camera, the exposure times being 2s, 5s, 13s, 88s, 27s, 4s, 4s, and .25s, and Yeoman F. A. Achen obtained four photographs with the 15 ft camera, of 30s, 55s, 90s, and 10s exposure. This plate was likely taken at Guelma with the 40-foot camera. It was...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Guelma, Mr. W. W. Dinwiddie obtained eight photographs with the 40-foot camera, the exposure times being 2s, 5s, 13s, 88s, 27s, 4s, 4s, and .25s, and Yeoman F. A. Achen obtained four photographs with the 15 ft camera, of 30s, 55s, 90s, and 10s exposure. This plate was likely taken at Guelma with the 40-foot camera. It was...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory’s expedition for the August 30, 1905 Solar Eclipse sent parties to three locations, Porta Coeli, Spain, Daroca, Spain, and Guelma, Algeria. At Guelma, Mr. W. W. Dinwiddie obtained eight photographs with the 40-foot camera, the exposure times being 2s, 5s, 13s, 88s, 27s, 4s, 4s, and .25s, and Yeoman F. A. Achen obtained four photographs with the 15 ft camera, of 30s, 55s, 90s, and 10s exposure. This plate was likely taken at Guelma with the 40-foot camera. It was...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
In June of 1918 the U.S. Naval Observatory sent an expedition to Baker, Oregon to observe the solar eclipse. The equipment used at the Baker, Oregon site included three photographic instruments and three for spectroscopic work. All were mounted horizontally and used coelostats. The photographic instruments included a 6-inch “visual” objective, with a focal length of 105-inches, a Dallmeyer 6-inch lens, with a focal length of 33 inches, and a Brashear 7.5-inch triplet lens with a focal...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The U.S. Naval Observatory expedition to Sumatra to observe the total solar eclipse was planned by Astronomical Director of the Observatory Stimson J. Brown. For the expedition, two reflecting collimators and a coelostat with two 10-inch mirror were designed by Mr. L. E. Jewell and ordered especially for the expedition from J. A. Brashear. As six coelostats from the Transit of Venus expeditions were to be used, 6 of the corresponding Transit of Venus clocks were sent to George N. Saegmueller to...
Topics: astronomical photography, scientific expeditions, total solar eclipse, astronomical glass plates
The 26-inch Great Equatorial, also known as the 26-inch Equatorial and the 26-inch Refractor, saw first light on November 12, 1873. It was commissioned from the firm Alvan Clark & Sons, and was the largest refractor in the world at the time. It was with this telescope in 1877 that Professor Asaph Hall discovered the Moons of Mars. In 1893, the Observatory moved from Foggy Bottom to its current location in Georgetown Heights. A new mounting, complete with elevating floor, was installed by...
Topics: refractors, technical drawings, scientific instruments
The 26-inch Great Equatorial, also known as the 26-inch Equatorial and the 26-inch Refractor, saw first light on November 12, 1873. It was commissioned from the firm Alvan Clark & Sons, and was the largest refractor in the world at the time. It was with this telescope in 1877 that Professor Asaph Hall discovered the Moons of Mars. In 1893, the Observatory moved from Foggy Bottom to its current location in Georgetown Heights. A new mounting, complete with elevating floor, was installed by...
Topics: refractors, technical drawings, scientific instruments
The 26-inch Great Equatorial, also known as the 26-inch Equatorial and the 26-inch Refractor, saw first light on November 12, 1873. It was commissioned from the firm Alvan Clark & Sons, and was the largest refractor in the world at the time. It was with this telescope in 1877 that Professor Asaph Hall discovered the Moons of Mars. In 1893, the Observatory moved from Foggy Bottom to its current location in Georgetown Heights. A new mounting, complete with elevating floor, was installed by...
Topics: refractors, technical drawings, scientific instruments
The 26-inch Great Equatorial, also known as the 26-inch Equatorial and the 26-inch Refractor, saw first light on November 12, 1873. It was commissioned from the firm Alvan Clark & Sons, and was the largest refractor in the world at the time. It was with this telescope in 1877 that Professor Asaph Hall discovered the Moons of Mars. In 1893, the Observatory moved from Foggy Bottom to its current location in Georgetown Heights. A new mounting, complete with elevating floor, was installed by...
Topics: refractors, technical drawings, scientific instruments
The 26-inch Great Equatorial, also known as the 26-inch Equatorial and the 26-inch Refractor, saw first light on November 12, 1873. It was commissioned from the firm Alvan Clark & Sons, and was the largest refractor in the world at the time. It was with this telescope in 1877 that Professor Asaph Hall discovered the Moons of Mars. In 1893, the Observatory moved from Foggy Bottom to its current location in Georgetown Heights. A new mounting, complete with elevating floor, was installed by...
Topics: refractors, technical drawings, scientific instruments
The 26-inch Great Equatorial, also known as the 26-inch Equatorial and the 26-inch Refractor, saw first light on November 12, 1873. It was commissioned from the firm Alvan Clark & Sons, and was the largest refractor in the world at the time. It was with this telescope in 1877 that Professor Asaph Hall discovered the Moons of Mars. In 1893, the Observatory moved from Foggy Bottom to its current location in Georgetown Heights. A new mounting, complete with elevating floor, was installed by...
Topics: refractors, technical drawings, scientific instruments
The 26-inch Great Equatorial, also known as the 26-inch Equatorial and the 26-inch Refractor, saw first light on November 12, 1873. It was commissioned from the firm Alvan Clark & Sons, and was the largest refractor in the world at the time. It was with this telescope in 1877 that Professor Asaph Hall discovered the Moons of Mars. In 1893, the Observatory moved from Foggy Bottom to its current location in Georgetown Heights. A new mounting, complete with elevating floor, was installed by...
Topics: refractors, technical drawings, scientific instruments
The 26-inch Great Equatorial, also known as the 26-inch Equatorial and the 26-inch Refractor, saw first light on November 12, 1873. It was commissioned from the firm Alvan Clark & Sons, and was the largest refractor in the world at the time. It was with this telescope in 1877 that Professor Asaph Hall discovered the Moons of Mars. In 1893, the Observatory moved from Foggy Bottom to its current location in Georgetown Heights. A new mounting, complete with elevating floor, was installed by...
Topics: refractors, technical drawings, scientific instruments
The 26-inch Great Equatorial, also known as the 26-inch Equatorial and the 26-inch Refractor, saw first light on November 12, 1873. It was commissioned from the firm Alvan Clark & Sons, and was the largest refractor in the world at the time. It was with this telescope in 1877 that Professor Asaph Hall discovered the Moons of Mars. In 1893, the Observatory moved from Foggy Bottom to its current location in Georgetown Heights. A new mounting, complete with elevating floor, was installed by...
Topics: refractors, technical drawings, scientific instruments
Live Music Archive
Librivox Free Audio
Metropolitan Museum
Cleveland Museum of Art
Internet Arcade
Console Living Room
Books to Borrow
Open Library
TV News
Understanding 9/11
